Ensure SYMTAB in rlib's with arch code but no syms

Author: aurxenon

src/archive_writer.rs

@@ -413,7 +413,7 @@ fn write_symbols(
         sym_names.write_all(sym)?;
         sym_names.write_all(&[0])?;
         Ok(())
-    })?;
+    })? || *has_object;
     Ok(ret)
 }